CHEM 120 (chem120)

The metric prefix which means 0.01 (one-one hundredth) is centi How many meters are in 1 kilometer? 1000 The amount of matter in an object is its mass Which of the following has the largest density? 1.8 g object with a volume of 1.0 mL A piece of metal is believed to be either platinum (valuable) or nickel (not so valuable). One way to decide is to calculate the density. The piece of metal is found to have a mass of 156.485 g. The piece of metal has an odd shape, so geome...

An object has a mass of 7.748 g and a volume of 5.6 mL. What is its density? Give your answer to the nearest tenths place correct answer: 1.4 g/mL An object has a mass of 12.876 g and a density of 1.5 g/mL. What is its volume? Give your answer to the tenths place correct answer: 8.6 mL An object has a volume of 3.8 mL and a density of 6.3 g/mL. What is its mass? Give your answer to the ones place (for example 21) correct answer: 24 g An object has a mass of 40.517 g and a density of ...

scientific notation correct answer: 3.94 x 10⁷= 0. = 8.0 x 10⁻⁶ measured v. exact numbers correct answer: measured = obtained through measurement and are uncertain exact = obtained through counting and are certain precision v. accuracy correct answer: precision = close to each other accuracy = close to the actual number conversion factor correct answer: a ratio of equivalent measurements used to convert a quantity from one unit to another density correct answer: d = m/...

Fahrenheit - 1.8(C) + 32 Celsius - (F-32)/1.8 Physical property - properties can be observed without changing the identity of the substance under observation Chemical property - properties can only be observed during a change int he identity of the substance under observation examples of chemical properties - corrosive, combustible, mutagenic, teratogenic, explosive examples of physical properties - size, malleability, ductility, conductivity, density, state of matter Homogenou...

Chemistry correct answer: The study of matter and the changes it undergoes Matter correct answer: Anything that has mass and occupies space Element correct answer: Basic material that can NOT be broken down into simpler substance What is matter made up of? correct answer: Atoms and Molecules Density of water correct answer: 1.00g/mL 1 kg = ? lbs correct answer: 2.205 lb 1 meter = ? in correct answer: 39.37 in 1 in = ? cm correct answer: 2.54 cm Precision correct a...

Hypothesis correct answer: a testable educated guess Experiment correct answer: how we test hypotheses Variable correct answer: Idea to be tested (only one) Control correct answer: Something the variable is tested against Experimental protocol correct answer: How do you do the test? Results correct answer: Data generated comparing variable to controls. Includes statistics to show results are meaningful Conclusion correct answer: Interpretation of results independent v...

Saturated correct answer: alkane Unsaturated correct answer: alkenes and alkynes CH3CH2CH2CH2CH3 correct answer: Pentane C2H6 correct answer: Ethane what are your terminal carbons correct answer: CH3 CH3-CH2-CH3 | CH3 correct answer: 2-methyl-propane T or F: the branch needs to have to lowest number possible correct answer: true CH3-CH2-CH2-CH3 | CH3 correct answer: 2-methyl- butane Alcohol correct answer: ROH what is an example of alcohol correct answ...

Polyatomic ions correct answer: ions that are made of more than one atom Nitrate correct answer: NO3- Nitrite correct answer: NO2- bicarbonate (hydrogen carbonate) correct answer: HCO3- Sulfate correct answer: SO4 2- Sulfite correct answer: SO3 2- Carbonate correct answer: CO3 2- cyanide correct answer: CN- Hydroxide correct answer: OH- Phosphate correct answer: PO4 3- Ammonium correct answer: NH4+ Ionic compounds correct answer: - crystalline solid ...

what is the formula for ionic compound correct answer: Xm+ Yn-= XnYm name the ionic compound Na+ I- correct answer: NaI name the ionic compound Ba2+ O2- correct answer: BaO Name ionic compounds Mg2+ N-3 correct answer: Cross multiply Mg3N2 (numbers are subscript) What is an ionic compound correct answer: metal and nonmetal How do you name ionic compounds? correct answer: Name the metal ion (first one), then name non-metal ion and end element with suffix "ide" polytonic ...

ionic compounds correct answer: -deals with charged particles -oppositely charged particles are attracted to each other -look for presence of metals and polyatomic ions molecular compounds correct answer: -share electrons -nonmetals -no polyatomic ions unless its an acid Type I metals correct answer: -ionic compounds -group 1A,2A,3A -one type of charge state -Name of metal +ion -if metal+nonmetal: name of metal+base name of nonmetal +ide -if metal+polyatomic ion: name of meta...